Calylophus serrulatus (Nutt.) Raven
Yellow sundrops, Yellow evening primrose, Plains evening primrose
Onagraceae (Evening-Primrose Family)
Yellow sundrops or yellow evening primrose is a leafy, bushy perennial
from 8-20 in. tall. Narrow leaves crowd the branched stems. Small, yellow, four-petaled flowers are borne from the upper leaf axils.
The best bloom occurs at the beginning of the plants flowering period. This is followed by sporadic flowering throughout the rest of the summer.
Image Gallery: 16 photo(s) available
Plant CharacteristicsDuration: Perennial Habit: Herb Fruit: Size Class:
Bloom InformationBloom Color: Yellow
Bloom Time: Apr , May , Jun , Jul
AZ , AR , CO , IL , IN , IA , KS , KY , MI , MN , MO , MT , NE , NM , ND , OK , SD , TX , WI , WY Canada: AB
, SK Native Distribution:
Alt. to Man. & e. WI, s. to e.c. AZ, e. NM & n. TX Native Habitat:
Dry, open plains & prairies USDA Native Status: L48(N), CAN(N)
Growing ConditionsLight Requirement: Sun
Soil Moisture: Dry
Soil Description: Dry, well-drained soil.